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T. P. ANTHONY. CORE BAR FULLER.

APPLICATION FILED APR. 23. 9H3- Patented May 20, 1919.

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THOMAS Pi, ANTHONY, OF EDGEWATER PARK, NEW JERSEY, ASSIGNOR T0 UNITEDSTATES CAST IRON PIPE AND FOUNDRY COMPANY, OF BURLINGTON, NE

JERSEY, A CORPORATION OF NEW JERSEY.

CORE-BAR FULLER.

To all whom z'tmayconcem I I 1 Be i known that I, TrroMAs P. ANTHONY, acitizen ofthe United' States of America, and. resident. ,of EdgewaterPark, in the county of Burlington and State of New J ersey, haveinvented a certain new and useful Improvement in Core-Bar Pullers, ofwhich the following is a true and exact description, reference being hadto the accompanying drawings, which form a part thereof.

, My presentinvention. consists in novel preferred embodiment of myinvention.

Of the drawings:

Figure 1 is an elevation of a portion of a verticalpipe molding plant.

Fig. 2 is a partial sectional elevation of a pipe mold with core bars inplace therein,

and extracting means connected to the core bars, the section being takenon the line 22 ofFig. 3, and

Fig. 3 is a sectional plan taken on the line 33 of Fig. 2. I

The vertical pipe molding plant partially illustrated in Fig. 1 is ofthe type in which a series of double pipe mold flasks B are carried atthe periphery ofa turntable A. The pipes C are formed in the flasks B bypouring molten metal in the space between the outer wall of each moldcavity D formed in the molding sand D, and the corresponding core whichis axially disposed in the mold cavity. Each core ordinarily comprises abody or core bar E formed of metal, and coated with a more or lessfriable .and charrable material E. This coating E keeps the molten metalfrom coming into contact with the metallic core bar E, and by itspartial disintegration the heat of the Application filed April 23, 1918.Serial No. 230,328.

Specification of Letters Patent. Patented May 20, 1919.

molten metal, and the initial subsequent movement of withdrawal of thecore bar facilltates the removal of the latter from the casing formedabout it. In practice, however, it is commonly foundnecessary toapply avery considerable initial pull, amounting, in the case of large sizepipe, to several tons, to each core bar in order to start the withdrawalmovement of the latter from the finished and cooled casting. A slightinitial withdrawal movement of the core bar E is ordinarily suflicient,however, to so disintegrate the core coating E, that a very much smallerpull is required to complete the withdrawal' movement of the core bar. I

The means which I have devised for with drawing a core bar E fromthemold, after the molten metal forming the casting D has been poured, andhas solidified in the mold, comprises a lever element F, pivotallyconnected between its ends to the upper end of the core bar. As shownthislever element is in the form of a clevis or yoke, which straddlesthe core bar and is pivotally connected to the latter by a removable pinGr passing through a transverse hole formed for the purpose in the corebar E.- One end of each lever rests on a fulcrum block H formed on, orcarried by the upper end of the flask. The other or power arm of thelever F is connected to a suitable pull trans- .mitting element, which,in the construction shown, is in the form of a chain or flexible elementI. Advantageously, each lever F extends in a direction substantiallytransverse to the length of thel'core bar E in the initial position ofthe core bar relative to the mold. When an upward pull is then exerted'upon the power arm of the lever F through the element I, the liftingforce impressed on thecore bar is a multiple of the pull transmittedthrough'the element 1, which is equal to the ratio between the effectivelengths of the tWO arms of the lever F. As shown,thisratio'isconveniently made something like or greater than two to one.

end F of the lever moves off the fulcrum H, and the lever turns intoparallelism with the core rod, the total pull exerted on the core baris, of course, that exerted by the element 1, but, as I have alreadyexplained, the resistance to the withdrawal movement of the core barvery considerably decreases during a very slight initial movement of thecore bar. Advantageously, as shown, the fulcrum end F of the lever isrounded off to facilitate a smooth withdrawal movement of the core bar,minimizing any horizontal 1 thrust or pull on the core bar, and also tomake the turning movement of the lever from the horizontal position ofthe latter shown in Fig. 2, into the vertical position shown in Fig. 1,a gradual movement.

Where, as in the construction illustrated, my invention is applied tomultiple molds, comprising one or more pairs of mold cavities as in thedouble molds illustrated, the two levers F, for an adjacent pair of corebars, have their fulcrum ends in juxtaposition, and bothengaging thesame fulcrum block H, which may advantageously be, in effect a shortbeam bearing at its ends on the top of the flask and passing between thecorresponding core bars E. The pull transmitting elements K, attached tothe power arms of the pair of levers, are connected at their upper endsto a spreader member J, at points separated by the same distance as thedistance between the centers of the corresponding pair of core bars E.The spreader member is provided with suitable means for connection to asuitable hoisting device M, which will ordinarily be mounted asillustrated on an overhead crane. Ad-

vantageously, the spreader member J is separately connected at pointsadjacent its two ends through inclined flexible elements K, to the lowerend of the tackle K depending from the hoisting device. This mode ofconnections permits of a certain slight concentration of the liftingforce on whichever of the core members may stick the tightest in itsflask, while preventing an appreciable withdrawal movement of one coremember in advance of the other.

The present invention not only reduces the maximum lifting effect whichmust be exerted by the hoisting device to start the withdrawal movementof the core bars, but also correspondingly reduces the reactive pullexerted on the mold containing flas 5, tending to pull the latter awayfrom the turntable on which they are mounted. This avoids a difficultyof some practical importance experienced when it is attempted to pullthe core bars out of the molds by a direct lift as distinguished from alever action in which one end of the lever imparts a downwardly actingreactive force to the flask.

Having now described my invention,

what I claim as new and desire to secure by Letters Patent, is:

1. In pipe molding apparatus the combination with the vertical moldflask and means for drawing the core located above it, of a core member,a bifurcated lever formed of two bars, one pivoted on each side of thecore and so shaped as to be capable of moving to a position in alinementwith the core, said lever having one arm initially fulcrumed on theflask and the other connected to the core drawing means.

2. In pipe molding apparatus the combination with the vertical moldflask and means for drawing the core located-above it, of a core member,a bifurcated lever formed of two bars, one pivoted oneach side of thecore and so shaped as to be capable of moving to a position in alinement with the core, said lever having one arm initially fulcrumed on theflask 'on two points of support and the other connected with the coredrawing means.

3. Core bar extractors for pipe molding apparatus comprising a pair oflevers each adapted to be pivotally connected between its ends to acorresponding core bar, a spreader member and a pair of link connectionsfrom separated points of said spreader member one to one end of one andthe other to one end of the other of the second of said levers.

4. Core bar extractors for pipe molding apparatus comprising a pair oflevers each adapted to be pivotally connected between its ends to acorresponding core bar, a spreader member and a pair of link connectionsfrom separated points of said spreader member one to one end of one andthe other to one end of the other of the second of said levers, ahoistingelement and separate link connections between separated pointsof said spreader member and said hoisting element.

5. In pipe molding apparatus the combination with a multiple mold flaskand a pair of core bars therein of a lever for and detachably connectedto the end of each of said core bars, a fulcrum block mounted on theflask between the core bars on WlliCll'OIlQ end of each lever isfulcrumed, and a hoisting element connected to the other end of eachlever.

6. In pipe molding apparatus the combination with a multiple mold flaskand a pair of core bars therein of a lever for and detachably connectedto the end of each of said core bars, a fulcrum block mounted on theflask between the core bars on which one end of each lever is fulcrumed,and a hoisting element connected to the other end of each lever by meanscomprising a spreader member and a separate connection from the latterto the power end of each lever.

7. In pipe molding apparatus the combi- 13C nation with a multiple moldflask and a pair of core bars therein of a lever for and detachablyconnected to the end of each of said core bars, a fulcrum block mountedon the flask between the core bars on which one end of each lever isfulcrumed, and a hoisting element connected to the other end of eachlever by means comprising aspreader member and a separate connectionfrom the latter to the power end of each lever, said separateconnections being connected to the spreader member at points separatedfrom one another by a distance equal to the distance between the pivotsof the two levers and core bars.

THOMAS P. ANTHONY.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents. Washington, D. G.

